include/net/netfilter/nf_conntrack_timestamp.h

   1 #ifndef _NF_CONNTRACK_TSTAMP_H
   2 #define _NF_CONNTRACK_TSTAMP_H
   3
   4 #include <net/net_namespace.h>
   5 #include <linux/netfilter/nf_conntrack_common.h>
   6 #include <linux/netfilter/nf_conntrack_tuple_common.h>
   7 #include <net/netfilter/nf_conntrack.h>
   8 #include <net/netfilter/nf_conntrack_extend.h>
   9
  10 struct nf_conn_tstamp {
  11         u_int64_t start;
  12         u_int64_t stop;
  13 };
  14
  15 static inline
  16 struct nf_conn_tstamp *nf_conn_tstamp_find(const struct nf_conn *ct)
  17 {
  18 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
  19         return nf_ct_ext_find(ct, NF_CT_EXT_TSTAMP);
  20 #else
  21         return NULL;
  22 #endif
  23 }
  24
  25 static inline
  26 struct nf_conn_tstamp *nf_ct_tstamp_ext_add(struct nf_conn *ct, gfp_t gfp)
  27 {
  28 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
  29         struct net *net = nf_ct_net(ct);
  30
  31         if (!net->ct.sysctl_tstamp)
  32                 return NULL;
  33
  34         return nf_ct_ext_add(ct, NF_CT_EXT_TSTAMP, gfp);
  35 #else
  36         return NULL;
  37 #endif
  38 };
  39
  40 static inline bool nf_ct_tstamp_enabled(struct net *net)
  41 {
  42         return net->ct.sysctl_tstamp != 0;
  43 }
  44
  45 static inline void nf_ct_set_tstamp(struct net *net, bool enable)
  46 {
  47         net->ct.sysctl_tstamp = enable;
  48 }
  49
  50 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
  51 extern int nf_conntrack_tstamp_init(struct net *net);
  52 extern void nf_conntrack_tstamp_fini(struct net *net);
  53 #else
  54 static inline int nf_conntrack_tstamp_init(struct net *net)
  55 {
  56         return 0;
  57 }
  58
  59 static inline void nf_conntrack_tstamp_fini(struct net *net)
  60 {
  61         return;
  62 }
  63 #endif /* CONFIG_NF_CONNTRACK_TIMESTAMP */
  64
  65 #endif /* _NF_CONNTRACK_TSTAMP_H */